What is the big deal with all these QR codes (Quick Response codes) I keep seeing on posters? They are a kind of barcode, but why are they only machine-readable? Why can’t they be made human readable so we can see what they mean? Here’s one I made earlier, readable by a special app on your phone, tablet or whatever.

Lovely. But why isn’t it human-readable? My theory is that it activates the curiosity factor. Only by following the link and getting your gadget to read it can you find out what it is all about… If you knew already what the QR code said, you probably wouldn’t bother to scan it.

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